WA Labor to choose Senate candidates

The West Australian Labor Party is poised to choose its Senate candidates for the federal election in September.

The party's state executive will meet on Monday night to determine the candidates.

The number one spot is expected to be taken by right faction chief Joe Bullock, the WA branch secretary of the Shop, Distributive and Allied Employees' union, following a split in the party's left faction.

Senator Louise Pratt is expected to be bumped to the number two spot.

Veteran Senator Mark Bishop is tipped to miss out.

Sue Lines, assistant national secretary of union United Voice, is likely to be the candidate for the casual vacancy left by the resignation of Senator Chris Evans earlier this year.